Refreshing old hardware with Linux
Like many of us, I have an old laptop just laying around that works mostly just fine, but is a …
Category Archives: Technologies
Ancient Tools: The TECO Editor vs. UTF-8 Text
Back in the days of yore, when computers had front panels of switches and lights and core memory was actually …
Even more PCM bit depth and a look at the filter response
This post describes improvements in the dynamic range of PCM samples recovered from the PDM microphone in the SPLear™ sound …
More dynamic range in the SPLear PDM conversion
This post describes improvements in the dynamic range of PCM samples recovered from the PDM microphone in the SPLear™ sound …
SPLear firmware improvements: scared threshold and packetized recording
This post describes some tweaks to SPLear™ sound level measurement module firmware to make it more useful when connected to …
Recording what scared us with a SPLear and a Raspberry Pi
This post describes how to record audio from a SPLear™ sound level measurement module connected to a Raspberry Pi, when …
Hearing the SPLear with GPIO on a Raspberry Pi
This post describes how to use outputs other than the UART from a SPLear™ sound level measurement module connected to …
Picturing the Noise with a SPLear and a Raspberry Pi
This post describes how to plot SPL over time, using a SPLear™ sound level measurement module connected to a Raspberry …
Sending mail from the SPLear with a Raspberry Pi
This post describes how to send an email when a SPLear™ sound level measurement module connected to a Raspberry Pi …
Controlling the SPLear from the Raspberry Pi
This post demonstrates using a SPLear™ sound level measurement module with a Raspberry Pi from a simple Lua script. The …
Words from Cheshire Engineering Corp. 